Excerpted from CISSP All-in-One Exam Guide, 6th Edition by Shon Harris (McGraw-Hill; 2013) with permission from McGraw-Hill.

Shon Harris, CISSP, MCSE, is the founder and CEO of Shon Harris Security LLC and Logical Security LLC, a security consultant, a former engineer in the Air Force’s Information Warfare unit, an instructor, and an author. Shon has owned and run her own training and consulting companies since 2001. She consults with Fortune 100 corporations and government agencies on extensive security issues. She has authored three best-selling CISSP books, was a contributing author to Gray Hat Hacking and Security Information and Event Management (SIEM) Implementation, and a technical editor for Information Security Magazine.